definition of atomic number
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atomic number atomic number. The number of protons in the nucleus of an atom. In electrically neutral atoms, this number is also equal to the number of electrons orbiting about the atom's nucleus. The atomic number of an element determines its position in the Periodic Table.
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What does an atomic number represent? See Atomic number for more details and references. The atomic number of a chemical element (also known as its proton number) is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus.
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atom atom. n. 1. (Atomic Physics). a. the smallest quantity of an element that can take part in a chemical reaction. b. this entity as a source of nuclear energy: the power of the atom.
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Atomic number The atomic number or proton number of a chemical element is the number of protons found in the nucleus of an atom. It is identical to the charge number of the nucleus. The atomic number uniquely identifies a chemical element. In an uncharged atom, the atomic number is also equal to the number of electrons. The sum of the atomic number Z and the number of neutrons, N, gives the mass number A of an atom. Since protons and neutrons have approximately the same mass and the mass defect of nucleon bin
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atomic number atomic number definition. The number of protons or electrons normally found in an atom of a given chemical element. The higher the atomic number, the heavier the atom is. In a neutral atom, the number of protons and electrons is the same. (See atomic weight and periodic table of the elements.)
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Translations for atomic number The atomic number, Z, should not be confused with the mass number, A, which is the number of nucleons, the total number of protons and neutrons in the nucleus of an atom. The number of neutrons, N, is known as the neutron number of the atom; thus, A = Z + N (these quantities are always whole numbers).
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Atomic number An explanation of the superscripts and subscripts seen in atomic number notation. Atomic number is the number of protons, and therefore also the total positive charge, in the atomic nucleus. The Rutherford–Bohr model of the hydrogen atom (Z = 1) or a hydrogen-like ion ().
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atomic number Chem. a number representing the relative position of an element in the periodic table, in which the elements are arranged in the order of their nuclear charges; a number representing the positive charge or the number of protons in the nucleus of the atom of an element: isotopes have the same atomic number but different mass numbers. noun.
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Atomic mass An atomic mass (symbol: m a) is the mass of a single atom of a chemical element. It includes the masses of the 3 subatomic particles that make up an atom: protons, neutrons and electrons. Atomic mass can be expressed in grams. However, because individual atoms have very small masses, this is not very helpful. Instead, atomic mass is expressed in unified atomic mass units (unit symbol: u). 1 atomic mass unit is defined as 1/12 of the mass of a single carbon-12 atom.
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Difference between Atomic Mass and Atomic Number Element showing its atomic number and mass number. Atomic number is used to define the type of element a material or substance is. It is the number of protons present in an element’s nucleus. The atomic mass, on the other hand, is the number of both the protons and neutrons present in the nucleus of the element. Electrons do not usually weigh much, so the atomic mass is calculated by adding the number of protons to neutrons. It is also referred to as the atomic weight.
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26 Oracle Data Types For example, in a Unicode database (UTF8), you must define a VARCHAR2 column that can store up to five Chinese characters together with five English characters. In byte semantics, this would require (5*3 bytes) + (1*5 bytes) = 20 bytes; in character semantics, the column would require 10 characters.
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Atomic Structure The number of protons in the nucleus is the atomic number of that atom. The atomic number represents the number of protons (+) and is equal to the number of electrons (-). The atomic number is equal to the number of protons in an atom's nucleus. The atomic number determines which element an atom is.
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The Atomic Number The atomic number is the number of protons in the atomic nucleus. The new concept of the atomic number brought even more power to the periodic table. Instead of the elements being arranged by relative atomic masses, elements could now be arranged by atomic numbers without one element out of order.he atomic number is the number of protons in the atomic nucleus. The new concept of the atomic number brought even more power to the periodic table. Instead of the elements being arranged by relative atomic masses, elements could now be arranged by atomic numbers without one element out of order.
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Neutron Their properties and interactions are described by nuclear physics. The nucleus consists of Z protons, where Z is called the atomic number, and N neutrons, where N is the neutron number. The atomic number defines the chemical properties of the atom, and the neutron number determines the isotope or nuclide.The terms isotope and nuclide are often used synonymously, but they refer to chemical and nuclear properties, respectively. The atomic mass number, symbol A, equals Z+N.heir properties and interactions are described by nuclear physics. The nucleus consists of Z protons, where Z is called the atomic number, and N neutrons, where N is the neutron number. The atomic number defines the chemical properties of the atom, and the neutron number determines the isotope or nuclide.
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CHEMISTRY I: ATOMS AND MOLECULES The atomic number is the number of protons an atom has. It is characteristic and unique for each element. The atomic mass (also referred to as the atomic weight) is the number of protons and neutrons in an atom. Atoms of an element that have differing numbers of neutrons (but a constant atomic number) are termed isotopes.
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General Chemistry/Numbers Used to Describe Atoms The Atomic number is the number of protons in the nucleus of an atom. This number determines the element type of the atom. For instance, all neon atoms have exactly ten protons. If an atom has ten protons, then it must be neon. If an atom is neon, then it must have ten protons.
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- The atomic number is the number of protons in a single atom of that element. Os is number 76, meaning one atom of osmium has 76 protons. The proton number never changes in an element; it's basically what makes that element that element.
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Atomic mass From Wikipedia, the free encyclopedia. An atomic mass (symbol: m a) is the mass of a single atom of a chemical element. It includes the masses of the 3 subatomic particles that make up an atom: protons, neutrons and electrons. Atomic mass can be expressed in grams. However, because individual atoms have very small masses, this is not very helpful.
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CONTENTS atomic number – The number of protons in an atom. Sometimes called the proton number. number of electrons in an atom’s electron shells. element – A substance made up of only one type of atom.
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What does the mass number on the periodic table mean? Is the mass number on the periodic table? Mass number is the number of protons and neutrons in the nucleus of an atom, and differs by isotope. For example, carbon-12 and carbon-14 are two isotopes of carbon.
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CHEMISTRY I: ATOMS AND MOLECULES The atomic number is the number of protons an atom has. It is characteristic and unique for each element. The atomic mass (also referred to as the atomic weight) is the number of protons and neutrons in an atom.
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Determining Protons, Neutrons and Electrons of Atoms and Ions Atomic Structure Links. The atomic number is the number of protons in the nucleus of an atom. It is listed on the periodic table for each element. No two elements have the same atomic number (or the same number of protons), so the atomic number identifies the element.
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Atomic Number and Mass Number Atomic Number (Z) = Number of protons =Number of electrons. For example, an atom of magnesium contains 12 protons, therefore, its atomic number is 12. All the atoms of a particular element contain same number of protons in their nuclei. Therefore, all the atoms of an element have same atomic number.
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Difference Between Mass Number and Atomic Mass Mass number is the total number of neutrons and protons in a nucleus of an atom. The collection of neutrons and protons is also known as nucleons. Therefore, mass number can also be defined as the number of nucleons in a nucleus of an atom.
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- What is the atominc number the atomic mass the number of protons neutrons and electrons in an atom of neon? The atomic number of Neon is 10. The atomic mass is 20.1797amu (amu means and is the short form or abbreviation of atomic mass unit). The number of protons/electrons:10. The n…umber of Neutrons: 10.   The Big-Bold handwriting in the upper left hand corner of each element box of periodic table are Atomic number.
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atomic number [1815–25] The number of protons in the nucleus of an atom. In electrically neutral atoms, this number is also equal to the number of electrons orbiting about the atom's nucleus. The atomic number of an element determines its position in the Periodic Table.